function user=user_pack(SS,x1,x2,xi1,xi2,n1,n2,k1,k2,tau,gamma,p_grid_constraint,y_grid_constraint)

user.SS=SS;
user.x1=x1;
user.x2=x2;
user.xi1=xi1;
user.xi2=xi2;
user.n1=n1;
user.n2=n2;
user.k1=k1;
user.k2=k2;
user.tau=tau;
user.gamma=gamma;
user.p_grid_constraint=p_grid_constraint;
user.y_grid_constraint=y_grid_constraint;

    %
